<ol>
  <li>Enter the degree of the polygon (number of edges / corners) in the
  options tool bar. Valid numbers range from 3 to 99.</li>
  <li>Choose the option Corner to Corner to define the polygon with two
  opposite corners.</li>
  <li>Set the first corner or middle of a side of the polygon using the mouse
  or enter a coordinate in the command line.</li>
  <li>Set the second, opposite corner or middle of a side of the polygon.</li>
</ol>
